Want to play music or videos through OBS and have them play in Zoom or Teams well this video will guide you through how to export sound mic/music/videos from OBS into you meeting software.

You'll need a Virtual Audio Cable.

VB Audio (recommended)
https://vbaudio.com/Cable/

Blackhole 16ch (what I use)
https://github.com/ExistentialAudio/B...

Loopback (gets a good name for Mac but I haven't used it)
https://rogueamoeba.com/loopback/